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A curated list of Domain Name System (DNS) related tools

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# Awesome DNS [![Awesome](https://awesome.re/badge.svg)](https://awesome.re)

> A curated list of Domain Name System (DNS) related tools.

This list supersedes CENTR R&D projects table with a broader scope of all useful resources for DNS enthusiasts and professionals.

## Contents

- [Abuse detection](#abuse-detection)
- [Authoritative servers](#authoritative-servers)
- [Crawlers](#crawlers)
- [Data validation](#data-validation)
- [DNSSEC](#dnssec)
- [Education](#education)
- [Resolvers](#resolvers)
- [Testing and monitoring](#testing-and-monitoring)

## Abuse detection

- [LogoMotive](https://logomotive.sidnlabs.nl/) - Detects logos on websites and provides insights into logos (mis)use. [![License](https://img.shields.io/badge/License-Custom-blue.svg)](https://logomotive.sidnlabs.nl/downloads/SIDN_LogoMotive_Software_Community_License_v1.pdf) ![Maintained: stalled](https://img.shields.io/badge/Maintained-stalled-orange)
- [RegCheck](https://www.sidnlabs.nl/en/news-and-blogs/dns-belgium-and-sidn-collaborate-on-ml-project-aimed-at-detecting-suspect-domain-name-registrations) - Machine learning library to assess the risk of domain name registrations. ![License](https://img.shields.io/badge/License-Custom-blue.svg) ![Maintained: no](https://img.shields.io/badge/Maintained-yes-green)

## Authoritative servers

- [BIND](https://www.isc.org/bind/) - Flexible, full-featured DNS system. [![License: MPL 2.0](https://img.shields.io/badge/License-MPL_2.0-blue.svg)](https://opensource.org/licenses/MPL-2.0) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [Drink](https://framagit.org/bortzmeyer/drink) - An experimental authoritative name server (DNS server), intended for dynamic answers. [![License: GPL v2](https://img.shields.io/badge/License-GPLv2-blue.svg)](https://www.gnu.org/licenses/gpl-2.0.en.html) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [Knot DNS](https://www.knot-dns.cz) - High-performance authoritative DNS server. [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [NSD](https://nlnetlabs.nl/projects/nsd/about/) - Authoritative DNS name server for environments where speed, reliability, stability and security are of high importance. [![License](https://img.shields.io/badge/License-BSD_3--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [PowerDNS Authoritative](https://www.powerdns.com/auth.html) - Authoritative DNS name server with databases and scripting languages support. [![License: GPL v2](https://img.shields.io/badge/License-GPLv2-blue.svg)](https://www.gnu.org/licenses/gpl-2.0.en.html) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [YADIFA](https://www.yadifa.eu) - Clean room implementation with small memory footprint. [![License](https://img.shields.io/badge/License-BSD_3--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)

## Crawlers

- [DNS crawler (.cz)](https://gitlab.labs.nic.cz/adam/dns-crawler) - DNS crawler for getting info about a huge number of DNS domains. [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [Mercator](https://github.com/DNSBelgium/mercator) - An Open Source robust and scalable crawler for collecting information on the usage of domain names. [![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [Signs of Life](https://github.com/CENTRprojects/Signs-of-life) - Domain name crawler tool used in CENTR ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)

## Data validation

- [OpenPAQ](https://openpaq.de/) - Validates postal addresses to ensure data accuracy and integrity. Its core strength is handling real-world inputs with abbreviations, variants, extras, and typos. [![License: AGPL](https://img.shields.io/badge/License-AGPL-blue)](https://www.gnu.org/licenses/agpl-3.0.html.en) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
  
## DNSSEC

- [cascade](https://github.com/NLnetLabs/cascade) - A friendly DNSSEC signing solution: sensible defaults, controllability, observability and flexibility written in Rust. [![License](https://img.shields.io/badge/License-BSD_3--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [DNSViz](https://dnsviz.net) - DNSSEC-signed zone status analysis and visualisation. [![License: GPL v2](https://img.shields.io/badge/License-GPLv2-blue.svg)](https://www.gnu.org/licenses/gpl-2.0.en.html) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [LDNS](https://nlnetlabs.nl/projects/ldns/about/) - C Library and command-line tools to simplify DNS and DNSSEC operations. [![License](https://img.shields.io/badge/License-BSD_3--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [OpenDNSSEC](https://www.opendnssec.org) - Policy-based zone signer that automates the process of keeping track of DNSSEC keys and the signing of zones. [![License](https://img.shields.io/badge/License-BSD_2--Clause-blue.svg)](https://opensource.org/licenses/BSD-2-Clause) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [SoftHSM](https://www.opendnssec.org/softhsm/) - Software implementation of a cryptographic store accessible through a PKCS#11 interface. [![License](https://img.shields.io/badge/License-BSD_2--Clause-blue.svg)](https://opensource.org/licenses/BSD-2-Clause) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [validns](https://codeberg.org/DNS-OARC/validns) - DNS and DNSSEC zone file validator. [![License](https://img.shields.io/badge/License-BSD_2--Clause-blue.svg)](https://opensource.org/licenses/BSD-2-Clause) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)

## Education

- [EduDig](https://edudig.se/) - A web-based "dig" tool that helps to understand DNS and dig. [![License: MIT](https://img.shields.io/badge/License-MPL_2.0-blue.svg)](https://opensource.org/license/MIT) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)

## Resolvers

## Testing and monitoring

- [blaeu](https://framagit.org/bortzmeyer/blaeu) - Programs to create distributed Internet measurements on the network of RIPE Atlas probes. [![License](https://img.shields.io/badge/License-BSD_2--Clause-blue.svg)](https://opensource.org/licenses/BSD-2-Clause) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [check_dns_soa](https://framagit.org/bortzmeyer/check_dns_soa) - Nagios (or compatible, like Icinga) plugin to monitor all the name servers of a DNS zone. [![License](https://img.shields.io/badge/License-BSD_2--Clause-blue.svg)](https://opensource.org/licenses/BSD-2-Clause) ![Maintained: stalled](https://img.shields.io/badge/Maintained-stalled-orange)
- [check-soa](https://framagit.org/bortzmeyer/check-soa) - A simple command-line DNS testing tool. [![License](https://img.shields.io/badge/License-BSD_2--Clause-blue.svg)](https://opensource.org/licenses/BSD-2-Clause) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [dns-lg](https://framagit.org/bortzmeyer/dns-lg) - DNS Looking Glass. [![License](https://img.shields.io/badge/License-BSD_2--Clause-blue.svg)](https://opensource.org/licenses/BSD-2-Clause) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [dnssoftver](https://github.com/yevheniya-nosyk/dnssoftver/) - A tool to fingerprint DNS resolver software. [![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [DNS Workbench](https://workbench.sidnlabs.nl/) - Test multiple (authoritative) name server implementations. [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0.en.html) ![Maintained: stalled](https://img.shields.io/badge/Maintained-stalled-orange)
- [ENTRADA](https://entrada.sidnlabs.nl/) - Easily store and analyze large amounts of DNS traffic. [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0.en.html) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [IntoDNS.AI](https://intodns.ai) - AI-powered DNS & email security scanner: checks SPF, DKIM, DMARC, BIMI, MTA-STS, DNSSEC and 40+ blacklists with copy-paste AI fixes. No signup required. ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [Internet.nl](https://internet.nl/) - Check whether a website, email or internet connection uses modern Internet Standards. [![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [Zonemaster](https://zonemaster.net) - A software package that validates the quality of a DNS delegation. [![License](https://img.shields.io/badge/License-BSD_3--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)
- [Tapdance](https://codeberg.org/sidn/tapdance) - A configurable, near real-time authoritative DNS statistics collector based on dnstap. [![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0) ![Maintained: yes](https://img.shields.io/badge/Maintained-yes-green)

## Contributing

Contributions welcome! Read the [contribution guidelines](contributing.md) first.

## Footnotes

This awesome list is curated by [CENTR](https://centr.org) (Council of European National Top-Level Domain Registries)

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